I got your point that you think the principles don't change so they are to you written in stone I guess and you compare them to the laws of physics.
I do not agree with you that's all. I do not see wing chun as dependent at all on principles or concepts, these are just helpful ideas to aid us in developing the skill. It's the skill we are after right?
I am sorry you do not see that skill does not depend on concepts or principles.